Material for gasket

Active Publication Date: 2017-11-23
NICHIAS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006]An object of the invention is to provide a gasket material having resistance to a

Problems solved by technology

However, a gasket material that is subjected to a chromate treatment involves a significantly serious pro

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example

Examples 1-1 to 1-8 and Comparative Example 1

[0034]On the both surfaces of a stainless steel plate, a treatment liquid for forming a coating film obtained by mixing components in blending ratios (wt %) shown in Table 1 was applied by means of a roll coater such that the amount of the coating film shown in Table 1 was attained, and then, was dried at 180° C. to form a coating film. Subsequently, on the coating film, a primer layer was formed using a novolak (phenol resin). Then, on the primer layer, a rubber layer was formed using a binary fluororubber, thereby to prepare a sample. The alumina used was amorphous, and had an average primary particle diameter of 13 nm. The average primary particle diameter was measured by means of an electron microscope.

[0035]For the resulting sample, resistance to an anti-freezing liquid was evaluated by the following method.

[0036]The sample prepared above was immersed in a car radiator coolant (Toyota Genuine Long Life Coolant) (50% LLC) to a positio...

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PUM

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Abstract

A gasket material to be mounted in a vehicle engine, wherein, on one or both sides of a steel plate, a rubber layer is formed via a coating film including a reaction product of an acid component and a metal or a reaction product of an acid component and a metal compound, and at least one selected from zirconia, alumina and titania.

Description

TECHNICAL FIELD[0001]The invention relates to a material for a gasket (gasket material) to be mounted in a vehicle engine.BACKGROUND ART[0002]As a gasket to be mounted in a vehicle engine, in particular as a head gasket, rubber-coated stainless steel plates in which a rubber layer is laminated on a stainless steel plate are generally used. Further, in order to hold the rubber layer more firmly, a gasket material obtained by forming a chromate coating film of a chromium compound, phosphoric acid and silica on one or both sides of a stainless steel plate and laminating a rubber layer on the chromate film is also widely used (see Patent Document 1, for example).[0003]However, a gasket material that is subjected to a chromate treatment involves a significantly serious problem in respect of environment since hexavalent chromium is contained in a chromate treatment liquid, etc. Therefore, there is a demand for a gasket material that has thermal resistance or adhesiveness equivalent to tha...

Claims

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Application Information

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IPC IPC(8): F16J15/08C09K3/10F02F11/00
CPCF16J15/0818C09K3/10F16J15/0806F02F11/00F16J2015/0856C09K3/1009F16J15/08C09K2200/0213C09K2200/0239C09K2200/0607
Inventor AOYAGI, HIDEHARU
Owner NICHIAS CORP
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